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{{short description|'''HM Treasury office responsible for implementing and enforcing UK financial sanctions'''}}
{{Infobox organization
| name = Office of Financial Sanctions Implementation
| logo =
| type = Office within [[HM Treasury]]<ref name="OFSIAbout">Office of Financial Sanctions Implementation, [https://www.gov.uk/government/organisations/office-of-financial-sanctions-implementation/about About us] ''GOV.UK'', accessed 6 November 2026.</ref>
| founded = {{Start date|2016|03|31}}<ref name="OFSILaunch">HM Treasury, Office of Financial Sanctions Implementation and George Osborne, [https://www.gov.uk/government/news/new-body-to-support-financial-sanctions-implementation-launched New body to support financial sanctions implementation launched] ''GOV.UK'', 31 March 2016, accessed 6 November 2026.</ref>
| area_served = United Kingdom<ref name="OFSIAbout" />
| services = Financial sanctions guidance, licensing, investigation and enforcement<ref name="OFSIAbout" />
}}

The '''Office of Financial Sanctions Implementation''' ('''OFSI''') is an office within [[HM Treasury]] responsible for improving the understanding, implementation and enforcement of financial sanctions in the United Kingdom. It issues guidance and licences, investigates suspected breaches and takes enforcement action. Its responsibilities also include implementing the price cap on Russian oil.<ref name="OFSIAbout" />

OFSI was established on 31 March 2016. [[George Osborne]], then Chancellor of the Exchequer, described financial sanctions as a foreign-policy and national-security instrument and said the office would work with businesses and other government bodies to improve compliance and detect breaches.<ref name="OFSILaunch" />

Its work affects financial institutions, businesses, charities and individuals. OFSI's guidance states that UK citizens must comply with financial sanctions wherever they operate, as must entities established under UK law operating overseas and anyone carrying out relevant activities within UK territory.<ref name="OFSIAbout" />

== Establishment and purpose ==
The March 2016 announcement placed OFSI within [[HM Treasury]] and committed it to providing a service to the private sector while working with law enforcement. It linked the office's creation both to implementing foreign-policy and national-security objectives and to maintaining confidence in the UK financial-services sector.<ref name="OFSILaunch" />

== Functions and relationship to sanctions policy ==
OFSI explains that financial sanctions commonly involve freezing assets, prohibiting the provision of funds or economic resources to designated people, and restricting access to financial services or markets. Its licensing function can authorise activities otherwise prohibited under sanctions legislation.<ref name="OFSIAbout" />

The [[Foreign, Commonwealth and Development Office]] publishes the UK Sanctions List. OFSI's guidance cautions that an asset freeze and some financial-services restrictions can extend to businesses or other organisations owned or controlled by a designated person, rather than only entities explicitly named on the list.<ref name="OFSIAbout" />

== Enforcement powers ==
Changes introduced through the Economic Crime (Transparency and Enforcement) Act 2022 enabled OFSI to impose civil monetary penalties on a strict civil liability basis for relevant breaches after 15 June 2022. In explaining the changes, director [[Giles Thomson]] said that OFSI would no longer have to prove knowledge or reasonable cause to suspect a breach, but would still have to establish that a breach had occurred. The criminal legal test was not changed by this measure.<ref name="OFSIPowers">Giles Thomson, [https://ofsi.blog.gov.uk/2022/06/08/new-enforcement-powers-a-message-from-giles-thomson-director-of-ofsi/ New enforcement powers – a message from Giles Thomson, Director of OFSI] ''Office of Financial Sanctions Implementation'', 8 June 2022, accessed 6 November 2026.</ref>

The changes also allowed OFSI to publish details of financial-sanctions breaches where it had not imposed a monetary penalty. Thomson said that voluntary disclosure, efforts to prevent breaches, proportionality and the public interest would remain relevant to enforcement decisions; strict civil liability did not mean that every breach would attract a penalty.<ref name="OFSIPowers" />

== Development of the office ==
In a tenth-anniversary account published on 31 March 2026, [[Giles Thomson]] described the expansion of OFSI's guidance, threat assessments, sector-specific engagement and use of general licences. He said that enforcement increasingly used data and intelligence, together with warning letters, public disclosures and civil monetary penalties.<ref name="OFSITen">Giles Thomson, [https://ofsi.blog.gov.uk/2026/03/31/ofsis-10-year-anniversary-reflections-from-giles-thomson-director-of-ofsi/ OFSI's 10 Year Anniversary – Reflections from Giles Thomson, Director of OFSI] ''Office of Financial Sanctions Implementation'', 31 March 2026, accessed 6 November 2026.</ref>

{| class="wikitable"
|+ Frozen assets reported in OFSI's anniversary account
! Review period !! Amount !! Measure
|-
| 2024–2025 annual review || £37 billion || Assets reported to OFSI as frozen across sanctions regimes; not the office's income or budget.<ref name="OFSITen" />
|}

== See also ==
* [[HM Treasury]]
* [[Foreign, Commonwealth and Development Office]]
* [[Bank of England]]
* [[Office of Foreign Assets Control]]

== Notes ==
<references/>

[[Category:UK Government Agencies]]
[[Category:Financial Regulator]]
[[Category:Finance]]

Office of Financial Sanctions Implementation - Revision history

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